Resolution:
Making changes on the NMC web interface will also make changes on the ups, but the NMC must first be configured for Read/Write in the user configuration settings on the UPS. Once this is configured making changes on the NMC will update the display on UPS.

When changing NMC configuration to update Time using NTP, you need to pay attention to the update Interval. It can be set from 1 to 8760 hours(1 year). Make sure this is configured as needed. If time is not immediately updating, click the UPDATE Now box and click apply. You may need to refresh screen on UPS a couple times to see the change.